import PAYchatClient from 'paychat-sdk';

// Initialize client
const client = new PAYchatClient('pk_your_api_key');

// Create a payment link
const payment = await client.createPayment({
  amount: 10,
  description: 'Premium Subscription'
});

console.log(payment.payment.payment_url);
// → https://t.me/paychat_aibot?start=abc123

const payment = await client.createPayment({
  amount: 25.50,
  description: 'Product Purchase',
  metadata: { orderId: '12345' }
});

// Share this URL with your customer
const paymentUrl = payment.payment.payment_url;

// Create QR payment (expires in 5 minutes by default)
const qr = await client.createQRPayment({
  amount: 15.00,
  description: 'Coffee Shop Order',
  expiresIn: 300 // 5 minutes
});

// Display QR code to customer
console.log(qr.qr_payment.qr_url);

// Check status
const status = await client.getQRPayment(qr.qr_payment.id);
if (status.qr_payment.status === 'paid') {
  console.log('Payment received!');
}

// Create escrow between buyer and seller
const escrow = await client.createEscrow({
  amount: 100.00,
  buyerTelegramId: '123456789',
  sellerTelegramId: '987654321',
  description: 'Freelance Project'
});

// Buyer pays via payment_url
console.log(escrow.escrow.payment_url);

// After buyer confirms delivery, release funds to seller
await client.releaseEscrow(escrow.escrow.id);

// Or cancel and refund if there's a dispute
await client.cancelEscrow(escrow.escrow.id, 'Buyer requested refund');

const withdrawal = await client.createWithdrawal({
  telegramId: '123456789',
  amount: 5.00,
  memo: 'Cashback reward'
});

console.log(`Sent ${withdrawal.withdrawal.amount} USDT`);

const balance = await client.getBalance();
console.log(`Available: ${balance.balance.available} USDT`);

import express from 'express';
import { PAYchatClient } from 'paychat-sdk';

const app = express();
app.use(express.json());

app.post('/webhook', (req, res) => {
  const signature = req.headers['x-paychat-signature'];
  const payload = req.body;
  
  const isValid = PAYchatClient.verifyWebhook(
    payload,
    signature,
    'sk_your_secret_key'
  );
  
  if (!isValid) {
    return res.status(401).json({ error: 'Invalid signature' });
  }
  
  // Process webhook
  switch (payload.event) {
    case 'payment.completed':
      console.log('Payment received:', payload.data);
      break;
    case 'escrow.paid':
      console.log('Escrow funded:', payload.data);
      break;
    case 'escrow.released':
      console.log('Escrow released:', payload.data);
      break;
    case 'qr.paid':
      console.log('QR payment received:', payload.data);
      break;
  }
  
  res.json({ received: true });
});

new PAYchatClient(apiKey, options?)

try {
  const payment = await client.createPayment({ amount: 10 });
} catch (error) {
  console.error('Error:', error.message);
  console.error('Code:', error.code);
  console.error('Status:', error.status);
}